Data Sheet A4A Precision Pressure Gauge Data Sheet FEATURES A4A Precision Pressure Gauge 0.1% of span accuracy (ASME B 40.100 Grade 4A) ± Ranges from vacuum to 100,000 psi, gauge, absolute FEATURES and compound pressure Mirror-band dial and knife-edge pointer to eliminate Mirror band parallax errordial and knife edge pointer to eliminate parallax errorVacuum to 100,000 psi, gauge, absolute Ranges from Solid front protective case and compound pressure External zero adjustment Solid-front protective case Temperature-compensated movement significantly reduces temperature error TYPICAL USES SPECIFICATIONS Test Laboratories Accuracy: ±0.1% of span (ASME B40.100 Grade 4A) Precision Test and Measurement Validation Includes NIST Traceable Calibration Certification Calibration Laboratories Hysteresis: <0.1% of span Hysteresis may exceed ±0.1% of span for ranges equal to greater than 75,000 psi (±0.3% typical not to exceed ±0.4% of span) SPECIFICATIONS Case Size: 6˝, 8½˝, 12˝ or 16˝ Accuracy: Enclosure Rating: Case isofnotspan sealed, recommended for weather ±0.1% (ASME B40.100 Grade 4A) protectedNIST environment (includes Traceableonly Calibration Certification) Process Connection ¼ NPT Sizes: 6˝, 8½˝, Female 12˝, 16˝ 1 ⁄8 NPT Male or female Size: Ranges: Vacuum, Compound to 10,000 psi (absolute ¼ NPT Male or female pressure available) 9 ⁄16˝-18 UNF-2B Female for ¼˝ HP tubing Process Connection MS33649-4 Female ¼ NPT Female bottomonly 1 MS33656-4 Male only – back or bottom ⁄8 NPT Male or Female Size: MS-16142 only– back or bottom ¼ NPT MaleFemale or Female 9 Mil-G-18997D only ⁄16 -18 UNF-2B Male Female for ¼ HP tubing backback or bottom •MS33649-4 Standard Inlet Female Fittings: ¼only NPT –Female connection for ranges up to and including MS33656-4 Male only –10,000 backpsi. or bottom 9 ⁄16 -18 Female •MS-16142 Ranges greater than 10,000 Female only –psiback orUNF bottom compatible with AND10050-4, and Mil-G-18997D Male only –Aminco back 45-11310 or bottom Autoclave F-250-C. Pointer Travel: 350°: up to 30,000 psi Process Connection Back, bottom 300°: 40,000 to 50,000 psi Location: 270°: 60,000 thru 100,000 psi Case Style: Solid front, blow out rear cover, with intregal panel Dial: Zero adjustable mounting flangealuminum, white background, black numerals with polished mirror band Mounting Options: Intregal panel mount or optional wall mount bracket Repeatability: ±0.02% of span Pointer Travel: 350 Degrees up to 30,000 psi Hysteresis: <0.1% of span40,000 to 50,000 psi 300 Degrees Sensitivity: 270 Degrees 0.01% of span60,000 thru 100,000 psi Options: T hermal WETTED COMPONENTS compensation from –25°F to +125°F WETTED COMPONENTS Bourdon Tube Process Connection Inlet0/40 Fittingpsi: Beryllium copper Model 0/15 psi through 303 SS 0/50 psi through psi:Beryllium 403 SScopper: 0/15 psi through 0/40 psi Bourdon0/100,000 Tube A4A 403 SS: 0/50 psi through 0/100,000 psi NON-WETTED COMPONENTS NON-WETTED COMPONENTS Case Material Enclosure Rating Case Material Cast Aluminum Model Cast aluminum, solid front, blow out Case isCase not sealed, recommended for is not sealed, rear A4A cover; Integral Enclosurepanel Ratingmounting recommended for weather p rotected only weather protected environment flange environment only KEY BENEFITS KEY BENEFITS • Epozy-coated system for corrosion resistance • High accuracy for precision pressure • Rugged SS construction measurement • Integral span adjustment • Many process connection options • Compact design • Dual engineering unit scale optional OPTIONS OPTIONAL FEATURES Thermal Compensation: Bimetalic compensator corrects effects of ambient tem- perature on bourdon tube to-25°F maintain accuracybetween -25°F and +125°F Temperature to 125°F Slotted Link: Protects gauge movement from damage caused bysudden release of Compensation: pressure, such as burst testing applications Peak Load Indicator: Special cleaning for Oxygen Services, Special Peak Load Indicator: “Max Hand” red pointer which remains in position after Wall Mount: 6”,pointer. 8 ½”,External 12”, 16” being pushed by the primary knob allows for manual reset. Peak Load Indicator: Special units of measure and dual scales can be customized scale and Calibration options, Slotted Link to meet customer requirements. options, and Dual Scale opttions Curstom Scales : Special units of measure and dual scales can be customized to meet customer requirements. Hand Carry Case: Sturdy lightly paded case for storage and hand carry of gauge. Not suitable for use as stand alone shipping container. 1 of 5 All specifications are subject to change without notice. All sales subject to standard term

C ASHCROFT’ Trust the shield.® A4A Precision Pressure Gauge ORDERING CODE Example: Pressure Range Optional Features H - Special cleaning for oxygen service I - 6" Peak load indicator J - 8/" Peak load indicator K - 12" Peak load indicator L - 16" Peak load indicator P - Cleaned for general gas service S - Laminated safety glass W - Special cleaning, O2 clean, do not apply warning labels NOTE: Product codes are specified in psi based on maximum capability of the bourdon tube assembly. Full scale pressure range and units of measure must be specified by special instructions in addition to the product...

Data Sheet C ASHCROFT’ Trust the shield.® A4A Precision Pressure Gauge STANDARD RANGES STANDARD RANGES inHg inH20 mmHg -30 to 0 - Available in 8%”, 12” or 16.” Dial face diamerts only Available in 8%”, 12” or 16.” Dial face diamerts only Available in 8%”, 12” or 16.” Dial face diamerts only All specifications are subject to change without notice. All sales subject to standard terms and conditions. ©2020 Ashcroft Inc. A4A_gauge_ds_RevE_08-17-20